Mechanical Engineer
About the Role
This is a full-time hybrid role for a Mechanical Engineer at HelioRec.
The Mechanical Engineer will be responsible for the design, development, and technical execution of floating solar power plant systems for inland and nearshore environments. While the role requires a strong engineering foundation, it goes far beyond pure design work. The Mechanical Engineer will act as a technical lead across multiple projects, taking ownership from concept development and engineering studies to field implementation and commissioning.
The role involves developing and improving mechanical designs (floaters, connectors, structural elements), producing technical documentation, and supporting testing and validation activities both in laboratory and real operating conditions.
The Mechanical Engineer will also support certification processes (e.g., working with classification bodies), prepare technical documentation, and ensure that designs comply with applicable standards and technical requirements.
In addition, the role includes preparation of technical studies, engineering reports, and structured documentation required for grant applications, project approvals, certifications, and stakeholder communication. The ideal candidate is a hands-on “doer” capable of translating complex technical information into clear, actionable, and well-structured deliverables.
The Mechanical Engineer will work closely with suppliers and manufacturers to support prototyping, industrialisation, production, inspection, and quality control activities.
The role includes participation in installation and commissioning phases, providing technical support during project execution and resolving engineering issues when required.
While the role is primarily based in Paris, there is flexibility for some remote work.
The role requires travel (France and international).
CDD contract for the first 6 months, with the possibility to transition to CDI.
Requirements
- Minimum 5 years of professional experience in mechanical or marine engineering, with practical exposure to designing and building structures on water (naval, offshore, floating infrastructure, or similar)
- Proven track record in successful execution of real-world projects, from design to installation and validation
- A track record of managing technical projects from A to Z, rather than just performing isolated calculations
- Exceptional ability to synthesize technical information into clear, professional reports for external partners and grant committees.
- Familiarity with certification processes (e.g., DNV, Bureau Veritas) and the rigor required for high-stakes documentation.
- Excellent problem-solving and troubleshooting skills, with the ability to identify root causes and implement practical solutions
- Ability to work effectively in a multidisciplinary team and communicate clearly with engineers, suppliers, and project stakeholders
- Hands-on mindset, with willingness to support testing, prototyping, and on-site activities
- Bachelor’s or Master’s degree in Mechanical Engineering, Marine Engineering, Naval Architecture, or related field
- Fluent in English and French (written and spoken)
- Experience in solar energy or renewable energy systems is a plus
About the Company
At HelioRec, we develop advanced floating solar solutions for inland and nearshore environments, enabling renewable energy production without land use. Our systems are engineered for demanding conditions and support the decarbonisation of industrial sites and port infrastructures.
We are building a multidisciplinary team across engineering, project execution, and business development to scale our technology and deliver projects internationally.
We are looking for motivated and technically strong candidates who can contribute to this growth, combining domain expertise with the ability to operate in a fast-paced environment and collaborate across teams.
Send your CV and motivation letter to savetheplanet@heliorec.com
